> This is the online tool: http://kmt.hku.nl/~pieter/cgi-bin/resp/nph-PZT.cgi.
damn, it says it cant load it here :P but this seems like a simple formula to try out, from what you copied here. If that's all, and if I got what it means, I can see a patch coming right now :) let's see! thanks 2013/9/24 Funs Seelen <funssee...@gmail.com> > Hi Alexandre, > > This is the online tool: > http://kmt.hku.nl/~pieter/cgi-bin/resp/nph-PZT.cgi. > > It starts with an example and every time you refresh the page it gives you > a new one. If you scroll down there's a link that tells you how the > coefficients were calculated, e.g.: > 2 zeros give 3 coefficients: *a0* = G > *a1* = -G(Z0 + Z1) > *a2* = G(Z0*Z1) > > 2 poles give 3 coefficients: *b0* = 1 > *b1* = -(P0 + P1) > *b2* = (P0*P1) > > The linear difference equation is derived from these as you can see. > > Regards, > --Funs > > > On Tue, Sep 24, 2013 at 7:36 AM, Alexandre Torres Porres <por...@gmail.com > > wrote: > >> for what i see, it's not some sort of straight formula, right? seems a >> bit more complicated than that. >> >> cheers >> >> >> 2013/9/23 Funs Seelen <funssee...@gmail.com> >> >>> On Mon, Sep 23, 2013 at 5:35 PM, Alexandre Torres Porres < >>> por...@gmail.com> wrote: >>> >>>> >>>> thanks, here's a pic of what I have so far >>>> >>>> >>>> https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-prn1/11212_10151872996046683_1825736206_n.jpg >>>> >>> >>> Cool. >>> >>> >>>> >>>> > For extra inspiration you could have a look at PoZeTools >>>> >>>> It sure does look like what I need. Thanks. But extracting what I need >>>> to know about the math of converting from coordinates to coefficients was >>>> just over my head :P unfortunately, sorry. >>>> >>>> I was hoping for something simpler, like just the operations needed. If >>>> the info is in code, I need it to more explicit. I'd really appreciate if >>>> anyone knows how to read from this and just points it out for me so I can >>>> put it in a patch. >>>> >>>> I'm assuming it's rather simple math >>>> >>> >>> I remember I once learned how to do this but never repeated the >>> practice. If I find time to do that I would gladly try to figure it out >>> again, but if someone more experienced feels the urge to chime in before >>> that time I would be very happy too :). >>> >> >> >
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